Add Makefile for new math library implementation

JIRA: RTOS-1132

Author: Mikolaj Matalowski

libm/Makefile

@@ -0,0 +1,85 @@
+#
+# Makefile for math library
+#
+# Copyright 2025 Phoenix Systems
+# Author: Mikolaj Matalowski
+#
+# This file is part of Phoenix-RTOS.
+#
+# %LICENSE%
+#
+LIBMCS_WANT_DAZ := n
+LIBMCS_WANT_COMPLEX := y
+
+# Grab builitn definitions from gcc
+GET_DEFINITIONS = $(shell $(CC) -dM -E - < /dev/null)
+DEFINITIONS = $(filter-out #define, $(GET_DEFINITIONS))
+
+# Setting sizes of floating point types
+TARGET_NAME := __SIZEOF_DOUBLE__
+DOUBLE_SIZE = $(word 2, $(shell echo "$(DEFINITIONS)" | grep -E -o '$(TARGET_NAME)\s+(\w+)'))
+
+ifeq ($(DOUBLE_SIZE), 8)
+    CFLAGS += -DLIBMCS_DOUBLE_IS_64BITS
+else
+    CFLAGS += -DLIBMCS_DOUBLE_IS_32BITS
+endif
+
+TARGET_NAME := __SIZEOF_LONG_DOUBLE__
+LDOUBLE_SIZE = $(word 2, $(shell echo "$(DEFINITIONS)" | grep -E -o '$(TARGET_NAME)\s+(\w+)'))
+
+ifeq ($(LDOUBLE_SIZE), 10)
+    CFLAGS += -DLIBMCS_LONG_DOUBLE_IS_80BITS
+else
+    CFLAGS += -DLIBMCS_LONG_DOUBLE_IS_64BITS
+endif
+
+TARGET_NAME := __SIZEOF_LONG__
+LONG_SIZE = $(word 2, $(shell echo "$(DEFINITIONS)" | grep -E -o '$(TARGET_NAME)\s+(\w+)'))
+
+ifeq ($(LONG_SIZE), 8)
+    CFLAGS += -DLIBMCS_LONG_IS_64BITS
+else
+    CFLAGS += -DLIBMCS_LONG_IS_32BITS
+endif
+
+# Set options for denormals on the FPU
+ifeq ($(LIBMCS_WANT_DAZ), y)
+    CFLAGS += -DLIBMCS_FPU_DAZ
+endif
+
+ifeq ($(LIBMCS_WANT_COMPLEX), y)
+    CFLAGS += -DLIBMCS_WANT_COMPLEX
+endif
+
+CFLAGS += -Ilibm/libmcs/libm/include
+
+# Build for libmcs
+ifeq ($(USE_LIBMCS), y)
+
+    ifeq ($(LIBMCS_WANT_COMPLEX), y)
+        CFLAGS += -DLIBMCS_WANT_COMPLEX
+        OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o,$(wildcard libm/libmcs/libm/complexd/internal/*.c)))
+        OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o,$(wildcard libm/libmcs/libm/complexd/*.c)))
+        OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o,$(wildcard libm/libmcs/libm/complexf/internal/*.c)))
+        OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o,$(wildcard libm/libmcs/libm/complexf/*.c)))
+    endif
+    
+    # fenv.c implementation is target specific
+    OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o, $(filter-out %fenv.c,$(wildcard libm/libmcs/libm/common/*.c))))
+    OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o,$(wildcard libm/libmcs/libm/mathf/*.c)))
+    OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o,$(wildcard libm/libmcs/libm/mathf/internal/*.c)))
+    OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o,$(wildcard libm/libmcs/libm/mathd/*.c)))
+    OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o,$(wildcard libm/libmcs/libm/mathd/internal/*.c)))
+else
+    # Build for phoenix implementation
+    # OBJS += $(addprefix $(PREFIX_O)libm/, $(patsubst %.c,%.o, math/common.c math/trig.c))
+    OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o, $(patsubst %complex.c,, $(wildcard libm/math/*.c))))
+
+    ifeq ($(LIBMCS_WANT_COMPLEX), y)
+        OBJS += $(addprefix $(PREFIX_O), $(patsubst %.c,%.o, libm/math/complex.c))
+    endif
+
+    # This part is needed for libmcs headers compatibility
+    CFLAGS += -include libm/libmcs/libm/include/internal_config.h
+endif